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#11
I find it hard to believe that a 1 foot (30 cm) drop onto a soft-ish surface would have pranged the card.
I believe that those are all acceptable temperatures.
An alternate suggestion: try Furmark (FurMark: VGA Stress Test, Graphics Card and GPU Stability Test, Burn-in Test, OpenGL Benchmark and GPU Temperature | oZone3D.Net). That's designed to heavily load the GPU. If that doesn't crash it, I'd suggest a software/OS problem.